 The study aimed to analyze the psychometric properties of the COVID-19 specific pandemic fatigue scale using classical test theory, CTT, and RASH model approaches in a representative sample of 1,018 adults who completed an online survey in November 2020. The results suggest that the CPFS has moderate reliability and internal consistency, is composed of a single dimension, and can be used to ascertain the level of pandemic fatigue in the general population. This article was authored by Carmen Rodriguez-Blasquez, Maria Romebarja, Maria Falcon, and others.